iPhone (Jailbroken): One of the slight annoyances with the iPhone's banner notifications is the fact it blocks the top of your screen. CoverMeNot is a simple, but useful jailbreak tweak that resizes your screen slightly so banner notifications don't cover up what you're doing.

It might not sound like much, but when banner notifications block off your screen it's annoying. With CoverMeNot, the notification resizes your status bar, pushes the screen down slightly, and doesn't get in the way. You can find CoverMeNot as a free download in the ModMyi repository.